Combined mixer and carrier.



F. D.. ROBBINS. COMBINED MIXER AND CARRIER.

APPLICATION I'ILED EAR. 9, 1910.

Patented Dec.6,1910.

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FRANK D. ROBBINS, 0F OAKLAND, CALIFORNIA.

COMBINED MIXER AND CARRIER.

Specification of Letters Patent.

Patented Dec. 6, 1910.

Application filed. March 9, 1910. Serial No. 548,181.

To all whom it may concern:

Be it known that I, FRANK D. ROBBINS, citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented new and useful Improvements in Combined Mixers and Carriers, of which the following is a specification.

This invention relates to cement and concrete mixers and carriers, and particularly to a combined mixer and barrow or wheeled vehicle.

It is desirable, especially on small jobs, to provide a means whereby the great loss of time and material usually attending the mixing and later transportation of concrete or cement may be obviated and to enable the manually propelled barrow to be utilized also as a mixer, thus resulting in a great reduction of labor and expense and permitting a more advantageous distribution of the mixed material.

A purpose of my invention is to provide acombined mixer and portable vehicle for cement; and particularly to provide a means whereby a quantity of the usual ingredients to make concrete may be charged into the vehicle and by it be mixed while the material is being transported from the charging point to the place of delivery; means are also provided whereby the vehicle may be adapted to operate as a simple barrow or as a mixer.

It has other objects and advantages which will be apparent hereinafter.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which- Figure 1 is a plan, in partial section. Fig. 2 is a side elevation, broken away to omit the spoke of one wheel. Fig. 8 is a detail section of a door and guide. Fig. 4 is a detail section of a door lock. Fig. 5 is a transverse section of the door lock. Fig. 6 shows a modified form of door.

The illustrated embodiment of my invention comprises a suitably formed drum A secured to a central transverse shaft 2 turn able and normally loose in the hubs 3 of wheels 4. The drum carries a clutch member 5 adapted to cooperate with a corresponding clutch member 6 on one of the wheel hubs when it is desired to lock the shaft to the wheels so as to rotate the drum when the device is pushed or pulled along. J ournaled at 7 loose on the hubs 3 is a looped handle or bail 8 by which the machine may be controlled and propelled.

The drum A which may be of any suitable size, shape and material is provided with any preferred form of closure 9, movable to close the charging opening. As here shown, the door or cover 9 comprises two hinged segmental plates, Fig. 6, held in closed position by a turnable locking arm 9 pivoted centrally on one leaf of the door and engageable with keepers 10 on the drum so as to hermetically close the opening.

When it is desired to use the machine as a conveyer or barrow only, the drum A is locked to the handle or tongue 8, and disengaged from the wheels by suitable means,

here shown as a clutch 11 secured on and turning with the shaft 2 and engaged by a yoke 12 of lever 13 pivoted at 14: to the handle 8. If the outer end of lever 13 be pushed outward, it will shift the shaft 2 inward to disengage clutch members 5, 6 and carry the clutch 11 into engagement with a lug 15 fast on the handle 8. A friction plate or catch 16 holds the lever 18 in its shifted position and the locked shaft 2 will not turn as the machine is propelled on its wheels 4, the hubs of which turn freely in the bearings 7 and upon the shaft 2. Thus the drum may be filled with material and the barrow pushed to the place where the material is to be deposited. The barrow is then dumped either by raising the bail or throwing lever 13 to engage the clutch members 5, 6, and moving the device to give the drum a half turn; assuming, of course, doors 9, 9 have been opened.

In order to convert the barrow into a mixer, the lever 13 is shifted toward the bail 6, withdrawing the clutch 11 from engagement with the lug 15, shifting the shaft 2 and causing clutches 5, 6 to engage. WVhen the clutch members 5, 6 have been firmly closed the drum is locked to the wheel and this connection of the two insures the rotation of the drum simultaneously with the wheels as the apparatus is propelled.

The operation of the machine is as follows: An operator charges the drum A with the usual components, water, sand, rock and cement, and then closes the cover and looks it by the bar 10 so that the fluid contents cannot leak out as the drum revolves. As the operator starts to push the loaded vehicle, he throws the lever 13 to shift the shaft and to engage the clutch members 5, 6, whereupon the drum turns with the wheels, tumbling and thoroughly mixing the contents, which operation continues while the wheels 4: are revolving. Arriving at the place where the now mixed material is required the operator reverses the lever 13, uncoupling the shaft 2 from wheel 4, and closes the tilting clutch 11 on its cooperative lug 15, whereupon the uplifting of handle G will turn the bucket and permit the contents to flow from the mouth 8 as the door 7 is opened.

A particular advantage derived from my invention is that an operator can fill the drum at the source of material supply before the material is mixed and the mixing operation will automatically occur while he 15 transporting it; and again a small quaa tity can be discharged from time to time at divers places, and while the apparatus is being moved between these locations; the remaining material being repeatedly tumbled and mixed so that the stone does not settle 3 and result in depositing concrete at different places of varying richness 0r consistency.

It will thus be seen that I am able to entirely dispense with an expensive power mixing machine of the stationary type, and, therefore, the usual attendants of the mixer are not needed, and that with my apparatus the operator fills the receptacle, transports and mixes the material simultaneously, and can empty the drum as the occasion requires.

Having thus described my invention, what I claim and desire to secure by Letters-Patent, is:

1. A portable concrete mixer and carrier comprising bearing wheels, a handle connected to said wheels, a shaft supported thereon and about which the handle is turnable in a vertical plane, a rotatable drum on said shaft, clutch mechanism between the drum and wheels for locking the shaft atwill to the wheels, to cause the drum to turn with said wheels, and means for coupling the handle to the shaft to enable the shaft to be turned by the handle and the drum to be tilted by the handle.

2, A manually propelled concrete mixer comprising an axle, traction wheels loose on the shaft, a receptacle secured on the shaft, a handle turnable on the shaft, means for coupling said shaft to said wheels to cause the receptacle to rotate with the wheels, and means for coupling the handle to the shaft to enable said shaft to be turned and the receptacle dumped by the tilting of the handle.

3. A combined barrow and miXfir comprising supporting Wheels with hubs, a shaft on which the wheels turn loose, a tongue piyoted on the hubs, a drum carried by and mounted to turn with the axle, means for locking the shaft at will to the wheels to cause the drum to turn with the wheels, and means for locking the tongue to said shaft to enable the .drum to be turned and dumped by the tongue independent of the movement of said wheels.

4. A combined barrow and mixer comprising supporting wheels with hubs, a shaft on which the wheels turn loose, a tongue piv- ,oted .on the hubs, a drum carried by and mounted to turn with the shaft, and means for locking the shaft at will to the wheels to cause the drum to turn with the wheels,

said last named means including complementary clutch mechanism between the drum and Wheels and other clutch mechanism between the tongue and shaft.

In testimony whereof I have hereunto set my hand n the presence of two subscribing witnesses.

FRANK D. noBBiNs.

lVitnesses;

CHARLES HUeHns, XV. D HnMrHnnY. 

